pub fn new_birthday_probability(n: u32) -> f64 {
    // TODO: 这里写逻辑
    if n >= 365 {
        return 1.0;
    }
    let mut ans = 1.0;
    for i in 0..n {
        ans *= (365 - i) as f64 / 365.0;
    }
    1.0 - ans
}
